Revert "Added code to make wysiwyg start in native mode of IE11 (IE10)"

This reverts commit 0bc11666879d055d66fd9dbb424bd85f72e9ceb6.
Revert "Wysiwyg worked earlier with IE11 only in compatibility mode. Added code to enable wysiwyg mode in IE11 native mode."

This reverts commit a83eef349e196825038b87f0752ae7d755592a2e.
Wysiwyg worked earlier with IE11 only in compatibility mode. Added code to enable wysiwyg mode in IE11 native mode.